LOS ANGELES: Twitter king Ashton Kutcher gave his followers a big clue Wednesday that he may be joining “Two and a Half Men” – either that or he's punking them. “What's the square root of 6.25?” the actor asked in a tweet. The answer is 2-1/2. Kutcher's online message came amid reports that he's nearing a deal to replace the fired Charlie Sheen on TV's top-rated comedy. The 33-year-old was negotiating with series producer Warner Bros., The Hollywood Reporter said Wednesday, citing unidentified sources. Earlier, Broadcasting and Cable reported Kutcher had emerged as a candidate for the CBS series. Warner Bros. declined comment, as did CBS. Kutcher's representatives did not immediately respond to a request for comment. There is deadline pressure to get a deal done, with CBS presenting its fall lineup to advertisers in New York next Wednesday. Kutcher gained fame on another sitcom, “That 70s Show,” then focused on film roles (the romantic comedy “No Strings Attached” the most recent) and producing, including the prank show “Punk'd.” There was speculation Wednesday that Kutcher could parlay his nearly 6.7 million Twitter followers and even bigger Facebook fan club into continued healthy viewership for “Two and a Half Men.”